proc

core.when
0.000001

Calls a composition for truthy input.

Arguments
procrequired
The composition to execute for truthy inputs.
Return Value
The result of the given composition, or null if the input is falsey.
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Conditionally echoing a value
Setup
authorization=PROCAUTH

require "proc"

client = Proc.connect("PROCAUTH")

const Proc = require("@proc.dev/client");
const client = Proc.connect("PROCAUTH");

client.core.when {
  client.core.echo("is true")
}.call(true)

client.core.when(undefined, {}, () => {
  return client.core.echo("is true");
}).call(true);

curl "https://proc.run/core/when" --silent \
--header "authorization: bearer $authorization" \
--header "content-type: application/vnd.proc+json" \
--header "accept: text/plain" \
--data '[[">>", ["%%", true]], ["$$", "proc", ["{}", ["()", "core.echo", [">>", ["%%", "is true"]]]]]]'
 

is true

Note that core.when cannot be composed with core.else. Prefer core.when to core.if for use-cases where you do not have a corresponding call to core.else—it helps communicate intent.

core.echo
Responds with a given value.
core.else
Defines an else branch of logic.
core.equal
Checks two values for equality.
core.exec
Executes a composition.
core.fork
Creates a forked composition.
core.if
Calls a composition for truthy inputs.
core.not
Checks if a value is falsey.
core.ping
Responds with a pong.
core.pipe
Pipes a composition result.
core.set
Sets an argument value.
core.sleep
Sleeps for a period of time.
core.unless
Calls a composition for falsey input.
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